Message #228330

[chickendude]

Be careful using HL to store one byte into an address, when you're storing HL into CURCOL, you're also updating CUROFFSET. Check out ti83plus.inc:

curRow               EQU  844Bh
curCol                EQU  844Ch
curOffset            EQU  844Dh

As HL is a 2-byte register, you load the value of L into CURCOL ($844C) and the value of H into CURCOL+1 ($844D aka CUROFFSET). You could use the accumulator (A) instead, or just load HL into CURROW to update both CURROW and CURCOL.